June 10 is a fun mix of food days, quirky hobbies, and one important national day. Some of these days are official. Most are light-hearted observances you can enjoy in your own way.
Quick answer: On June 10 every year, people mark National Iced Tea Day, National Black Cow Day (root beer float), National Ballpoint Pen Day, National Egg Roll Day, National Herbs and Spices Day, and Portugal Day. World Gin Day and International Yarn Bombing Day fall in the second week of June, but their dates change each year, so they only land on June 10 in some years.
June 10 Events at a Glance
| Day | Type | Where it is observed |
|---|---|---|
| Portugal Day | National day | Portugal and Portuguese communities worldwide |
| National Iced Tea Day | Food and drink | Mainly the US |
| National Black Cow Day | Food and drink | Mainly the US |
| National Egg Roll Day | Food | Mainly the US |
| National Herbs and Spices Day | Food | Mainly the US |
| National Frosted Cookie Day | Food | Mainly the US |
| National Ballpoint Pen Day | Fun and quirky | Mainly the US |
Note: Most US food days are unofficial. They are popular on social media and with cafes, but they are not government holidays.
Fixed-Date Events on June 10
1. Portugal Day
Portugal Day is known in Portuguese as Dia de Portugal, de Camões e das Comunidades Portuguesas. It is the national day of Portugal. It remembers the death of the poet Luís de Camões, who is seen as the country’s greatest literary figure, and it also honors Portuguese communities living abroad.
How to celebrate: Read about Portuguese history and poetry, try Portuguese food, or join a local community event if there is one near you.
2. National Iced Tea Day
Iced tea became hugely popular in the US after the 1904 World’s Fair in St. Louis, where hot weather pushed visitors toward cold drinks. Today it is one of the best-loved summer drinks.
How to celebrate: Try a new flavor such as peach, mint, or hibiscus. Sweetened or unsweetened is your choice. You can also host a small iced tea tasting at home.
3. National Black Cow Day
A Black Cow is another name for a root beer float: root beer poured over vanilla ice cream. The name is often linked to the dark color of the root beer. It is a nostalgic soda-fountain treat that suits a hot day.
How to celebrate: Make one at home. Fun fact: National Root Beer Float Day is a separate observance on August 6.
4. National Egg Roll Day
The egg roll is a crispy, fried roll filled with vegetables and sometimes meat, closely linked with Chinese-American cooking. It is a popular takeout snack.
How to celebrate: Order from a favorite restaurant, or try making a vegetarian version at home.
5. National Herbs and Spices Day
This day celebrates the fresh and dried herbs and spices that add flavor to our food. It is a nice reminder to cook with more variety.
How to celebrate: Try a new spice blend, grow a small herb pot on your windowsill, or cook one dish using only fresh herbs.
6. National Ballpoint Pen Day
This day marks June 10, 1943, when Hungarian inventor László Bíró filed a patent for the ballpoint pen. He designed it after noticing that the ink used in newspaper printing dried fast and did not smudge.
How to celebrate: Write a handwritten note or letter to someone you care about.
7. National Frosted Cookie Day
Another sweet US food day. It is a good excuse to bake or buy a few cookies and share them.
Events Near June 10 With Changing Dates
These two days are often listed under June 10, but their dates are not fixed. Always check the current year’s date before you plan or publish anything.
World Gin Day
World Gin Day is held on the second Saturday of June. It began in 2009 in Birmingham, England, started by gin fan Neil Houston. Since 2013 it has been led by Emma Stokes, known as Gin Monkey, and it has grown into a global event with tastings, cocktail menus, and bar events.
Upcoming dates: 13 June 2026, 12 June 2027, and 10 June 2028.
Please note: Alcohol is only for adults of legal drinking age, and the legal age is different in different countries and Indian states. Drink responsibly, never drink and drive, and enjoy mocktails or a gin-free tonic if you prefer.
International Yarn Bombing Day
Yarn bombing, also called guerrilla knitting or yarn storming, means covering public objects such as lamp posts, benches, or railings with colorful knitted or crocheted pieces. It is a gentle, temporary form of street art. The modern movement is widely linked to Houston artist Magda Sayeg, who knitted a cover for her shop’s door handle in 2005.
International Yarn Bombing Day was started by Canadian crafter Joann Matvichuk in 2011, and the first one was held on June 11. Sources differ on how it is dated today (some say June 11, others the second Saturday in June), so check with the group or event you plan to join.
Good practice: Use soft, removable pieces, ask permission where needed, and take your work down after the event so you do not damage property or leave litter.
Easy Ways to Celebrate June 10
- Make a Black Cow float and an iced tea for a simple summer treat
- Cook an egg roll dinner and add fresh herbs and spices
- Write a handwritten note with your favorite pen
- Learn about Portuguese culture and cuisine
- Join or start a small knitting or crochet project with friends
Frequently Asked Questions (FAQs)
What is celebrated on June 10?
June 10 includes Portugal Day, National Iced Tea Day, National Black Cow Day, National Egg Roll Day, National Herbs and Spices Day, National Frosted Cookie Day, and National Ballpoint Pen Day.
Is June 10 a public holiday?
In Portugal, June 10 is the national day. Most other June 10 observances, such as the food days, are unofficial and are not public holidays.
When is World Gin Day?
It is on the second Saturday of June each year. It falls on June 13 in 2026, June 12 in 2027, and June 10 in 2028.
What is a Black Cow drink?
A Black Cow is a root beer float made with root beer and vanilla ice cream.
Why is National Ballpoint Pen Day on June 10?
Because it marks the date in 1943 when László Bíró filed his patent for the ballpoint pen.
What is yarn bombing?
It is a form of street art where people cover public objects with knitted or crocheted pieces, also called guerrilla knitting.
Final Thoughts
June 10 is a small day with a lot of variety. Whether you pour an iced tea, write a note, or learn about Portugal’s national poet, a little celebration can brighten an ordinary day. Just remember to check the date each year for floating events like World Gin Day and International Yarn Bombing Day.
